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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44e3c54db7ef565fe280347a590179365f9a08f2f732576079c89f78c8b87a92' 
  AND token = 'zdBi69KKFXonUrr5gT+YUfRc+0vNM0MMGbugq6MyZCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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