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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0d1daef5c9c50f08ac5c1934fc7be8125a5ed72b996a4926f05608f1b7a7f69' 
  AND token = 'ZdatluA/8tBW72cKnUNa5HtXmuEyeNmhACIBcm7e474=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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