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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f6713c6f05d77870e323e7c1eef3753b054025d94a93f9f3333b55c5cf65209' 
  AND token = 'Uy0nef2rzvLMQedWSvkNZIZ8B5g9C7RHFokPwq3Rw14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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