Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '275965fad47b94f1b84c1a5708c10ebd5324956fb533fbbaed5dd47fd7a8475e' 
  AND token = 'De/2XgaKiaOIHsaqhMjB2J/SrdSkZZ7z3zTOzUb/TEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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