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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abd858e107825027475e2311a84a50c1c6e47e707a7de319ccc9ca130eb06cb9' 
  AND token = 'az8s9P1M03lztp6r2s52R2z0KjEY0t9o+oQfOlvUIko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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