Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd220ac1d30abc2d644466ab8c82d15feecd4010213b3e86d3983033cce99dcf1' 
  AND token = 'bcpf1OXPl1023e/MMEf9/JTl4MPkxN5TUDceJn4avX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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