Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b628c84ce576c84c5041220cc63bc2578fc248cfada95feee28eef85bea1ca6' 
  AND token = 'NOLGIA07zlqPNdqIr612/Qgw954LBpSqKWZ3UdNIDLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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