Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '294d26e5945e2e314b935503ff6f8e3f939b42f1ae06dcbd3a53be7664ad47d3' 
  AND token = 'CHRXZFeJWuxGc/gXUtq1ZstsmKmrb8Pts6HALKqVckU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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