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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61d2d769e05f79a591926ab2e4c43917dbbf595539ad7420658449cd924d6d4d' 
  AND token = 'GKS92lNFbNkiVAE9Gb3DfvU9s5+wcXhReizSHzbhrXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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