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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca668bd407b5c40a55c0168b1ff2b716d7aa8d0ddec1ece49221c7cf85c0dc1f' 
  AND token = 'Dej4MADMUENISA9nGFMn7RJYpRfevKeKwIkZfUtQBi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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