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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12365419a9a6e59bf60181026726c892cf44e14f896fbb7cde791fefb4a1815b' 
  AND token = 'ZnLIhCrnWk/qLhHY9ihEB1W01alDO7lqxzmf73CwLRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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