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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbaf57e4b7fa2103b5ca0b17ca7b7e664a5b65854180bd124a4dd267346cac01' 
  AND token = 'RaPvAnZ5pITPvV4tAr8VpG/K6dn/zzrAY0geGkukBHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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