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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01147062f359845ed1b76d0c9d99e6ad35f7050bf0e29d65a7acba4b7052f59b' 
  AND token = 'KiefrJqUWgJEDk9l3U4Br217EOQX6+iQ85RvMt24MFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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