Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd76e0f806033068c17a466bfa6134439ada9b257a003cabc5df7d13e3baba08' 
  AND token = 'nBREzamUsZpIXIjcG3Pi9lLHKL1NiL7LdpYbvFqVG+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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