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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2723a03dda7028816905d08428c36e7392f8cbbadc33ad507fb9d701e7f9eed' 
  AND token = 'IVYpwMe4toQhXNc1xJKAI8Z+NZubuWpFehPVPsfHtJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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