SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2183df384f9bdc9d35902443f81756d80a4aeb28bc60b2a46b855ac0183b938' 
  AND token = 'g/w0Rbp/B0pZlmEIPbV7jXGk3sr3GqZTu+QWp29vlpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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