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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ffcfa6212d9fa0d67ee1b83f237e75110af2a3b3fc996271d622812f0287c25d' 
  AND token = 'tyVOzYxdnTcm1e7+OI4Tdw44xYu2XIDs88AowZkSZbM=' 
  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"
    }
  }
}