Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd03d1a0559877628721644c42a9fea4fb33a5aff617bfba6de2e1d974007b311' 
  AND token = 'DIYkvxafUubr9++tXPpBSuQM8qZW1XEAfiIxi+1lNUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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