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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eead1636eb6c6712c831fa5bc63b0869a17be4603c7527a4e8e6111fa61dfb7' 
  AND token = 'J22bz7d5pT5HYnSHCCHMA0+yHCAW7BYrrRxC7xkVoV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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