Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9ab8dfe50c004ca7a6dbabdcebaffd40e11d8964d91e3293e84fd30a0d10ae08' 
  AND token = 'wvznRBcnwKNTnnZXbhFW2xB0zNOC5F03m00vtTmhgME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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