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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea2b2369dd916a8163b6dba69897c9a97960e23dc16119028436565a5d95a08e' 
  AND token = '70DxbH+c01kdh9Gb7nti+Oa5aPKt4lbmXCI0o7au/OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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