Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd52b40f052cfdf75864107439f017a61825b4b70b467e71fd95092a1768d3787' 
  AND token = 'i7o/qFXEL/zIDEvTFvP9si7DtPGpD2mxYHjPRE1+1DU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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