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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a10d7a2c64303637122c12a3b84f834b00b5621a824ebc4f2c310f2497e24c9' 
  AND token = 'lecbxCNTUcoyhApA6bqaWPd96I6U4qOQlFHp6WK8Z5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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