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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2aa8fbb4100573fb8b39244df5506c12c97f998dfacdbf3656ebbf5c07e94d9' 
  AND token = '6zEdSG2eLnXW48hf1eALiiuIFOaqw9bdx6TyGgPHYbw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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