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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d2cc1bc129d8e636a23f3468bad05c2ce2f7d8abaabc304a216a4e4f87addd' 
  AND token = '89JvWILsYk18WhR/uErv430lgUByYWuyq6gWajo4tqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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