SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37b02ff9f4044947f345b90cab5451808859b38c4d00fb2e210e964df675f6dc' 
  AND token = 'UOWAXNIzpVPRv6kauKctATVm37WwvY7d5vZ1+b1KRgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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