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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9d2a156a61ae9d669edad2771ce9d4781c0cac03f20a95e4fddb1d0169cdb01' 
  AND token = '6chMJBQ82nvpnC8jjiJASuKiC6A9Ygda20X74GjDt7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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