Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddf7e2cf21eb78940f28252cb9f347e697172ea63627cba8520874c2e9bb0e5a' 
  AND token = '2dWIgAyz44E+GUSeH2hlv+BEMkYFn8w1X3fzWqSsASU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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