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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1125021898427b70084bfb9cff9d2c4bced368c85f40e7bcc2d4ce7eae5d51df' 
  AND token = 'dNd/1G3QKpJsW8WMSUlUThsocfISGnUk6aZpnCxCSqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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