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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '953b2cef90dde59e06eb166de39137489b7a54bf685f03a3ec3ff6ac7fcf7705' 
  AND token = 'b+sXGn+O6BFJ74F2NUyRVMmjREepvn9dD6cggUy15qs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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