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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abae00897678c021c12a025e0ebdae6224bfe50d02b7744e92db81b1dbf94daf' 
  AND token = 'kwOyiJ3MCeq1rn8Ssu04n4Isc8r9yeSWZFkyooz/lpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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