SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4757d2a1799df6d279d079d11fa311ca27d66000cb7ac88452c67b2bb0d15b5b' 
  AND token = 'HKfQToH32TejwlW3EVvSZUXKM63iuQjh7OENnWhG+GE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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