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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0abbd9d086282acb7c9a26fcab235e778219f140926b9a37a913046e64a6841' 
  AND token = '1tz1nqK2YEdtB/vf5pauklY975fuOwVtqbjQIQkxybM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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