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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '182d94d74d8a16aab74e999a75fd65d7d5a98bb35c9bd39ffc82f8a13e5907a2' 
  AND token = 'tVUkn0f3hza11SwtsI2jS8KK6GCe7r6ErvoFS0QEeVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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