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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14ed0f67fe2ffea3a9f0bfbeda0b177ee5eaf6ae6bfe22af0254a53c2504ccf0' 
  AND token = 'E6bUR3ndaqVx1ghhQE8e9mOg/7FE05/VOYdP4ClzH1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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