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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dd7cfcd8e30dc2a200f08ee3e06fb3386059b872dcfbc9ac18f3f88c6e01e0f' 
  AND token = 'wmkO7xB2jdr9ALKfUBZCW4UfK79tl3m/sbco7oRVmmU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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