Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1baf00aa8ca038709b42cac6257a966ff85550dd03f62dca75560e1bfd1ca60a' 
  AND token = 'ja0mGnWIQuJDV1GliXT1MUZqAvLp9o6C87iP0c3HmzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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