Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b75a7ae1af28ea167401055ec045fe1f49d24ac18c019ead0dd59cf76d7fa10' 
  AND token = 'cXdJdjiOfQPk1kr8/f606whhV2YpPAZupW+fOPmZHC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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