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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '113372097fe5e47ef450102314f666957bcc227836ae4b26205746fdd97bfc6d' 
  AND token = 'Z6wMEax9W1DE5/07jv02Q8NlFieQFhORX1b25SGQq/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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