Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b081bc4b747b67c703a436d65d619e96117f7a7eeea7d6d9f9df27886f5ede44' 
  AND token = 'I3v7SqziBsFCVeaEicw8tVZXr0LiDK2XTFH4bKj4JBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}