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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '182aed77c0cd46d42c4fcaea47ba3849a48e1ace07b57d25bdf2f85859893efe' 
  AND token = 'LnWfel6IIJPS38+Z+76uYCF7jFANotLZ9a4ylyqKKHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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