Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0db2793dcc2771fb2e5fc7af4912c6a1486b3617bb1d5e35eb42c9a62b672713' 
  AND token = 'Z1G/+2ql4CUjQopGvyd97f+y+4+QiN7r57QjLavSBSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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