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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd416aace51130ac662c230037b359db0c4529011842be10fbd9e89aa59397089' 
  AND token = 'a+Hl85+bXkyqid649TclvB96LGP93yj0FhY3TxHWY0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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