Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5341f40310407412d77d74752531c2c6514fb7056b640c4d8706f4ccd3604a6' 
  AND token = 'lld9uPeuvSL5g24fg/UlQZvFqQsMMzWwOriPzwZFFmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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