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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a6fa134bf8d0500a89a3c9e5ee899b60287e9764ee29a6e0c49bc17b5ec9292c' 
  AND token = 'S+KlVmKEVV8gze1RtT4fzx0TIlDT6fewXgSevRmjvK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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