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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a1167ab37ec1b226a106ca5fdf64e23ff01dfd345f35245aef62ce936ed2f30' 
  AND token = 'p4wlG8YKF30H9sQriQlE081sFr76b1vYSx0avil/zhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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