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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '113e229c2cf6f9b454f15b7b53903f2748cb9b8549ede833a4f3a45b603f32a0' 
  AND token = 'joe5Bo3rcxbMow5fB/CJr6WlpqJmrOiQ5HkJqzWObok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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