Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6fa1257e4f5ae59718efb079fad22bf45ec10aa4e3b01cc5d4d17752e13d37e' 
  AND token = 'wVHoqlyryLvzlWXHiQtlqriouGSCPHbwwdVQDo3gSCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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