Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a14bed8cdad2033612dfd715662b4fcdcbef620e39e0543dc87958001d588b6' 
  AND token = '2ndPmsm3TeeN105tsY2lANWkK5zuIys4vurYJFX34iI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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