Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66d368b16d72ce2f8fe5aa2d3eee5b620e87669dcadb5b731bb4dc572527af7c' 
  AND token = '5+2fBMfOmXlW9rB+FKzQyQT9t4fa36gXLswylzzCYh0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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