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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '64477d578e1d8a3d12b7d57fafed96b4c110e8215d56bd03b93450957a784a5a' 
  AND token = 'SNP5eCNSMPv6St8XEwi+40qxe5jW621sALjByxY5oZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}