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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95d90b7b5102ef6ff33e617ed8fa86f06340a0f36124b01a099f10a5595b47e1' 
  AND token = 'Z/D1JIhH50a6ZoWLqY0OR9NVbOfHF3W991/2jjBv8Fw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}