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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a39e4e9de19bf7bcc48e1025b96b2b680c7b315e63e72509ddcb0426203b3192' 
  AND token = '/B25SqzJ4uf/EkenGe1tO2MlJXA6SdnP2nG0QpJn77A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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