Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a50c24c23fa6d445da6dacb876ca225c681ab07866f75033620b258e9e3eb8a' 
  AND token = 'vwwU82Iz3d2qXEyp/DqAoMB04CFb/w3ENi2rhY7peno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}