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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7118965aba30c50cdf9c9b6af4baeee9c93e5fbf031a3cedca46babae87b7e92' 
  AND token = 'RaMh0xGvIJlihYfFNLu2ig3CNSc8bLoMVrKo0dsbPbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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