SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55852c364b00a319ab6b5c2b30b29d8a3efdc32dd6aeead86269a6a4f0f58632' 
  AND token = 'c7tQ9nvgogZJ4MmJn5KYkx/lV3c+zUGWFzu+6wu1o/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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