Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1b744ea47ae6643f326ffe999f804fa59ad2040545ad4617299a62153412734' 
  AND token = '43aBvifyaFkP6Y1JFs6PFI+h5NsoVnKdcAoKIpHgw9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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