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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f0000fc0c4dc23f2481926528c2b667ac79630ed75a57a9104bb241b49b44fd9' 
  AND token = 'PICikiVmcrzUKxnvS8MOisiZfrdR7SZd5mfv5TgZSUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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