Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45212d1f8ab546a7d5b4b9cfd4479fa906ed2474f67521431ba3a0222c31f5e5' 
  AND token = 'xVA4X9yGSDXOADqMgNfallwtepmmCF2BN8JCbXqvDWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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