Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a2de1ae42fc4f1d2b17cbc5ff5cb1ae5196f65ce299623ee99b0b2be795db97' 
  AND token = 'fUE+IS4b4Rge84E2KEcv1sb5q72jlbSVonZv70+2KgU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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