Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6c46f74bde33779615d7712513f2ca24204b1f422310c42b70bd027fb4a466d' 
  AND token = 'h14IHLY9TBiBQNwerF5rlUXTKAs7LsHctonQJLrsxzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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