Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e5a1b62b589842e592eddbd8f37914fd00c7ede46217797ac45f5b10bd105dc' 
  AND token = 'IbPvl/8l2uY3HwJTR+3qLUF42dowrb7MUp9torR2uBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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