Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '884ebe40a98c41782ff178c1db32dea540afb5e29bdb729018e9e24d184b806e' 
  AND token = 'p5dYsary7KyF+Rf1Vemvn57MHitDtKS87SUqeu6251E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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