Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2231bdb1dddb29bbc5f2342ee8c213f6cb91566e0882a193a6562a5e1fad20bb' 
  AND token = 'h9JL+aDGF0Xp1DWp7YTrjWWCHqyThL7gOta8MsVY1Hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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