Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4a3153f00662182d6b8dc29093bb4e1d7a5451baee35809833444e6838cefae' 
  AND token = 'IRkP2YVnwkWTcj0gE6rowR2cmFnMhcwFI2Y90jVId9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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