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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0f473a4d76c3c9a23071d8a7bdde1f3b94db1230067e09dacaee19ed666ac60' 
  AND token = 'yhIv/YxzG7Z+gbmmizvP9ru6fJY8a7l1kfSpphTcZPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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