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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0536d01abc2864d03f0f8f9d98b8dffcf9fcd5cfbcfe553cb46791794aacb3c5' 
  AND token = 'EtyWR8vcmQjdEIUFQAKly0x57kgfo7Q5KuBpw6qSf4o=' 
  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"
    }
  }
}