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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aca4be9e838ef0739f571fdfbc37c229b8b33762196c8b1e3e023dd9b7bf4108' 
  AND token = 'GwnnLlZqFtJxSTbO/2k+GScFr7lyleqnqa/DN/k1GIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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